Percussion drill chuck



W. BELL PERCUSSION DRILL CHUCK Aug. '13, 1963.

Filed March '1, 1961 FIG. 2

Z/ wig/TOR.

United States Patent 3,100,659 PERCUSSIGN DRELL CHUCK Walterhell, Monroe, NY, assigncr to Star Expansion Industries Corporation, Mouutainville, NEG, a corporation or" Delaware Filed Mar. 1, 1961, Ser. No. 92,507

2 Claims. (til. 279-163} This invention relates to a means for supporting a percussion drill while it is in operative position and employed for the purpose of forming holes in materials such as stone, marble, plaster and the like.

As is well known, the use of such percussion drills requires that they be subjected to a series of suitable impacts during the drilling operation and also that they be rotated from time to time in the course of such drilling. By reason of such requirement, it has been the customary practice to support such drills in a variety of chucks of complex design and capable of accomplishing the necessary rotary action. At the same time, these chucks are adapted to the receipt of a suitable impact such as is commonly supplied by an electric impact tool. However, the equipment required to accomplish these operations is often unduly heavy or of elaborate and expensive design. Moreover, due to its complexity, a substantial amount of maintenance may be required in connection therewith. The present invention is concerned with overcoming these difliculties in a simple and ingenious manner.

Thus, it is an object of the present invention to provide an improved percussion drill chuck of inherently simple design which does not entail the incorporation of any elaborate rotating mechanism therein.

Another object of the invention is to provide a percussion drill chuck of the character indicated which incorporates improved means for receiving and ejecting a percussion drill, as desired.

Another object of the invention is to provide improved manual means for rotating such a percussion drill while it is secured in operative position.

A further object of the present invention is to provide an improved means for receiving an axial impact of an air or electric impact tool or other tools such as are commonly employed for percussion drilling purposes, said means being incorporated in the aforesaid chuck.

A further object of the present invention is to provide an improved means for securing a percussion drill while it is engaged in drilling operations.

A still further object of the invention is. to provide a percussion drill chuck capable of a great variety of angular manipulation thereby permitting the formation of holes by a percussion drill in any desired direction.

A still further object of the present invention is to provide an improved percussion drill chuck which has a minimum number of parts, which may be economically manufactured and which is of inherently strong and simple design.

Other and further objects of the present invention will become apparent from the following description as read in connection with the accompanying drawing.

In the drawing:

FIGURE 1 is a front elevational view of one embodiment of the present invention;

FIGURE 2 is a view of said embodiment of the invention taken about line 2-4 of FIGURE 1 and depicting the engagement of said embodiment of the inventionwith the head of an impact tool; and

FIGURE 3 is a fragmentary elevational view shown partially in cross-section and depicting a percussion drill chuck assembled with a percussion drill and a relative position of a wedge which may be employed for the removal of the percussion drill held by said chuck, when desired.

As shown in the accompanying drawings, one embodiment of the present invention comprises a cylindrical chuck 10 pivotably supported in a pair of springable arms 11, the said arms 11 being received in an elongated handle 12. This handle is preferably composed of a material such as plastic or rubber and maintains said arms 11 within a pair of oppositely disposed apertures 13 provided in the external periphery of the chuck it).

The chuck 10 is provided with an impact receiving member, such as an elongated shank 14 formed removably in or integrally with the chuck 1G. Said shank 14 is longitudinally aligned with an opposing tapered mouth 17 provided upon the face 15 of said chuck and adapted to receive a tapered shank 18 formed integrally with a fluted body .19 of a percussion drill, the said percussion drill being provided with a suitable hardened drill point 20' composed of a material such as silicon carbide. The shank 18 of said percussion drill is also formed with a conical tang 19a, the said conical tang projecting within a transverse aperture 21 provided in the chuck 10. This [aperture in turn is adapted for the reception of a suitable Wedging tool such as that illustrated in FIGURE 3 and designated therein by the numeral 22.

According to common practice, such wedging tool 22 may be inserted within the transverse aperture 21 and employed to eject the percussion drill when desired, the head 23 of said wedge being contactable with the aforesaid conical tang 19a of said percussion drill so as to exert a longitudinal force thereon when said wedge is subjected to impact in the direction of the arrow shown adjacent thereto in FIGURE 3. The chuck 10 may be rotated as desired by manually engaging the handle 12 and rotating the springaible arms 11 about the axis of the chuck 10. When so rotated, a percussion drill received within said chuck, as in the position depicted in said FIGURE 3, is adapted for the formation of holes in material such as stone, marble, plaster and the like, the said holes being directed at an angle corresponding with the angular inclination of the chuck 10.

To accomplish the formation of said holes, the shank 14 is engageable with the head 16 of an electric impact tool, as depicted in FIGURE 2. Since said shank 14 is aligned with the percussion drill, any force exerted thereon will be transmitted longitudinally to said drill so as to accomplish the required drilling operation. An important feature of the present invention resides in its rotatability which can be advantageously accomplished as follows. Thus, while the shank 14 is engaged in the aforesaid manner by the electric impact tool, the handle 12 may also be manually engaged and rotated manually during the drilling operation, as desired. It will be noted that the entire device described above is of inherently light construction so that such manual rotation is easily accomplished. Moreover, due to the inclinability of the chuck in the manner previously described, it may be quickly manipulated so as to form successively a variety of holes disposed at any desired angular inclination. Since the tapered aperture 17 conformably engages with the base 18 of the percussion drill, said drill is rigidly, securely and accurately disposed within the chuck upon its being set within the chuck, and subjected to a slight axial engaging pressure therewith, it being thereafter securely held within the chuck at all times during the drilling operation. Moreover, when desired, the percussion drill may be quickly removed from said chuck by means of a wedge as described above. Thereafter, percussion drills of other sizes may be received in the aperture 17, as desired and as needed for other drilling operations.

With respect to the conical tang 19a of the percussion drill, i-t should be noted that in practice it has been found preferable to form said portion of the percussion drill at an angle of 8 With respect to a plane disposed radially of said base, as indicated in FIGURE 3 of the drawing. This angular formation, it has been found, facilitates the ejecting action accomplished by the wedge 22 when removal of the percussion drill is desired.

It will be seen from the foregoing that the present invention accomplishes its objects in an advantageous mancner by providing an easily held pivotablc chuck adapted for the rapid receipt and ejection of a percussion drill as desired and also adapted for engagement with a suitableimpact tool such as is conventionally employed. Moreover, due to its inherently light and strong construction, the above-described form of the invention is easily carried about, may easily be stored in compact form and is capable of inherently long life.

Furthermore, the inclinable handle 12, may be pivoted at an acute angle with respect to the axis of the chuck so as to bring said handle close to said axis While at the same time permitting engagement of the handle for rotational purposes. -It will be seen that the present invention permits drilling operations in very confined and poorly accessible areas.

It will also be seen that due to the communication between the transverse aperture 21 and the mouth 17, the reception of the shank 18 Within the mouth 17 tends to dispose any dirt or debris therein into the aperture 21 where it is removed by gravity, the vibration produced by the impacts required during drilling operations or by the operation of the Wedge 22 during ejectrnent of the drill 19. Said transverse aperture is similarly maintained in a clean condition. It will therefore be seen that the above-described chuck is self-cleaning.

The embodiment of the invention illustrated and described hereinabove has been selected for the purpose of clearly setting forth the principles involved. It will be apparent, however, that the present invention is susceptible to being modified in respect to details of construction, combination and arrangement of parts which may be resorted to without departure from the spirit an scope of the invention as claimed.

I claim:

1. A percussion drill securing means comprising a percussion drill, a chuck provided with an axial member engageable with an impact tool to receivean axial impact therefrom, an aperture within said chuck in aligned position with respect to said axial member, the said axial impact being transmitted to said percussion drill when it is disposed within said aperture, the said chuck being provided with pivotable means for rotating said drill during its receipt of said axial impact, the said pivotable means comprising a pair of arms swing-ably receivable Within a pair of oppositely disposed apertures formed in the said chuck, the said arms being received in an elongated handle, the said chuck being rotatable upon rotation of the handle With respect to the axis of said chuck, said chuck being axially imperforate between said oppositely disposed apertures and said first-mentioned aperture.

2. A device for simultaneously retaining and rotating 2. percussion drill While it is subjected to axial impact comprising in combination, a cylindrical chuck, an elongated shank engageable with the head of an impact delivering tool, said shank being formed integrally with said chuck, said chuck being provided with a mouth aligned with said shank and contacta-ble with the shank of a percussion drill, a pair of arcu-ate arms pivotably engaged with a pair of opposing apertures formed in the external periphery of said cylindrical chuck, the said arcuate arms extending within a handle rotatable with respect to the axis of the chuck, said chuck also being provided with a transverse aperture communicable with said tapered mouth, said transverse aperture accommodating an ejecting tool contactable with the shank of said percussion drill, said chuck being axially imperforate between said opposing apertures on the one hand and said mouth and transverse aperture on the other hand.

References Cited in the file of this patent UNITED STATES PATENTS 2,314,013 Mueller Mar. 16, 1943 2,399,939 Phillips May 7, 1946 2,608,886 Morse Sept. 2, 1952 2,926,353 Werstein Mar. 1, 1960 2,936,736 Werstein May 17, 1960 FOREIGN PATENTS 931,742 Germany Aug. 16, 1955 

1. A PERCUSSION DRILL SECURING MEANS COMPRISING A PERCUSSION DRILL, A CHUCK PROVIDED WITH AN AXIAL MEMBER ENGAGEABLE WITH AN IMPACT TOOL TO RECEIVE AN AXIAL IMPACT THEREFROM, AN APERTURE WITHIN SAID CHUCK IN ALIGNED POSITION WITH RESPECT TO SAID AXIAL MEMBER, THE SAID AXIAL IMPACT BEING TRANSMITTED TO SAID PERCUSSION DRILL WHEN IT IS DISPOSED WITHIN SAID APERTURE, THE SAID CHUCK BEING PROVIDED WITH PIVOTABLE MEANS FOR ROTATING SAID DRILL DURING ITS RECEIPT OF SAID AXIAL IMPACT, THE SAID PIVOTABLE MEANS COMPRISING A PAIR OF ARMS SWINGABLY RECEIVABLE WITHIN A PAIR OF OPPOSITELY DISPOSED APERTURES FORMED IN THE SAID CHUCK, THE SAID ARMS BEING RECEIVED IN AN ELONGATED HANDLE, THE SAID CHUCK BEING ROTATABLE UPON ROTATION OF THE HANDLE WITH RESPECT TO THE AXIS OF SAID CHUCK, SAID CHUCK BEING AXIALLY IMPERFORATE BETWEEN SAID OPPOSITELY DISPOSED APERTURES AND SAID FIRST-MENTIONED APERTURE. 